SALTS 



100-0 100 100 



The first salt contained obviously 1 atom of 

 water ; it was in the same state as the salt which 

 I analyzed. The second contained nearly three 

 fourths of an atom, and the third very nearly 

 half an atom. These experiments were made 

 before chemists were in possession of the requi- 

 site data for accurate analysis. But I mention 

 them because they show that this salt may exist 

 with different proportions of water of crystalliza- 

 tion. 



Carbonate, 3. Carbonate of ammonia. This salt is anhy- 

 drous ; its constituents are 



1 atom carbonic acid 2 '7 5 



1 atom ammonia 2*125 



4-875 



It may be easily formed by mixing together 1 

 volume of carbonic acid gas and 2 volumes of 

 ammoniacal gas, both as dry as possible. These 

 two gases immediately condense into a white 

 powder, which is obviously a compound of 1 

 atom carbonic acid and 1 atom of ammonia, 

 and which does not contain any water. But I 

 have never met with this salt in commerce ; the 

 freshest carbonated ammonia which I have been 

 able to procure containing 1J atom of carbonic 



